What you now describe is different from what you stated in the original post.

QBI is defined as income, gain, deduction, and loss with respect to any qualified trade or business of the taxpayer.  As stipulated in the regs, only income, gain, deduction, and loss to the extent allowed in the current tax year can be into account for purposes of QBI.  This means amounts suspended for §179 and PAL would not be taken into account.

Are you sure suspended PAL was used to offset positive QBI from other qualified ToB?  I don't recall this being a problem last year.